car, cdr, cons: Fundamental Functions
In Lisp, car, cdr, and cons are fundamental
functions. The cons function is used to construct lists, and
the car and cdr functions are used to take them apart.
In the walk through of the copy-region-as-kill function, we
will see cons as well as two variants on cdr,
namely, setcdr and nthcdr. (See section copy-region-as-kill.)
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